Hook



FIG. 1 is a front elevational view of a hook showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a perspective view thereof.

The broken-line disclosure of elements in the views is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a hook, as shown and described. 